Test-valve mechanism for drying-cylinders.



A. H. WHITE. TEST VALVE MECHANISM FOR DRYING cvuunsns. APPLICATION FILED IULYII. I916.

I Patented Jan. 1,1918. .9

I 2 BHBETSSHEET I.

nurf

A. H. WHITE.

TEST VALVE MECHANISM FOR DRYING CYLINDERS. APPLICATION FILED JULYIY. 1916.

1,251,602. Patented Jan. 1,1918.

2 SHEETS-SHEET 2.

. 425. 5, I a #c UNITED STATES PATENT OFFICE.

AMBROSE H. WHITE, OFBROOKLYN, NEW YORK,

ASSIGNOR T0 TNTERNATIONAL PAIER COMPANY, A CORPORATION OF NEW"YOBK.

TEST-VALVE MECHANISM FOR DRYING'GYLINDEBS.

Specification of Letters Patent. 'Pate'nted J an, 1, 1918,

Application filed July 17, 19 16.. Seria1Np. -1Q9,,8 25.

.troduced, usually under pressure, through hollow journals on the cylinders. Such cylinders are usually equipped with means for the continuous discharge of the water of condensation collecting in the lower portion of the cylinder, since any considerable accumulation of water therein will greatlyjnipair the heating effect of the steam. It is desirable therefore that means he provided to enable the attendant to ascertain if the water isbeing properlydischarged from the cylinder or has collected therein, and if-so to what extent.

My invention aims to provide inexpensive means of simple construction for this purpose, and the invention consists in a test valve of improved form and construction applied to a vent opening in the cylinder, preferably in the end thereof, the said valve being provided with an actuating member adapted in the rotation of the cylinder to engage with an abutment, such for instance as an implement, tool or similar object, held fixedly in the hands of the attendant in the path of the actuating member, such engagement causing the actuating member to be moved and the valve to be opened or closed. By the employment of such valve, the attendant may from time to time actuate the same for testing purposes; the character of the jet issuing through the vent opening,

whether steam or water, and the point in the rotation of the cylinder where the jet changes from water to steam, will reveal to the attendant the conditions within the cylinder, both as respects the absence or presence of water, and thelevel of the accumulated water. The form, arrangement and construction of the parts is such that h l e may-b a t e i r emeen -Fl scribed, while the cylinder is rotating at a high rate of speed, sothat a test maybe performed without reducingthefspeed or withoutinterfering with the normal operation thereof. v i i n the accompanying drawings:

Figure l ,is an elevation partly in section of a drying-cylinder having my improyed test valve applied thereto.

Fig. .2 is a section on an enlarged scale through-the end portion of the cylinder and the testavalve.

Fig. 3 is an .end elevation showing the form of the valve actuating .member.

Fig. 4 isanendview of the valve body.

Fig. 5 is a sectionalview on anenlarged scale through the endof a drying cylinder, having a' test v valve applied thereto embodying. my invention in a modified form.

Fig. 6 is an insideface view of theactuating member -,showing the valve actuating cams thereon.

Fig. 7 is .a'perspectivelviewof a-portion of the ,cylinder showing how :the valve actuatingmemberis operated while the cylin der isrotating. Y

, Referring to-thedrawings: Re er i g o F g l ol usive, presents one of a series of rotary hollow drying cylinders suchas are employed in paper making machines .for ,drying the damp paper Web, around whichcylinders the web is adapted to pass asthe cylinders are rotated. Thecylinders are heated internallyby the introductionpf steam thereto. through .a hollow j ournal2, the .waterof condensationbeing continuously dischargedfromthe cylinderby suitable means,"1n the presentinstance Joy means of the siphon plpe 3 passing through the, hollow journal and terminating at its lower end adjacent ,the lower portion of thepylinder. I

My improved ,test valve is appliedeto the head of the cylinder adjacent its periphery, and controls 1 yentopening tleading from the interior of the cylinder. This valve in the particular formof the invention shown in Figs. 1 to "it comprises a valve seat .5 in the form .ofa disk seated in a'bushing 6 screwed in an openingin the head of the cylinder. The disk is provided on ,its outer face .with concavedfvalve. seat proper J7 a Mounted to turn in the bushing 6 on an axis parallel with the axis of rotation of the cylinder is a cylindrical valve bodylO, the inner end of which is formed with a convex surface 11 seated against and adapted to vcooperate with the concaved valve seat 7. A .port 12 extends longitudinally through the valve body from end to end and communicates at its inner end with the end of a branch port 13 formed in the convex end of the body and extending circumferentially thereof part way around, in such position that it may be moved into and out of register with the port 9 in the valve seat 7. \Vhen the valve body is in such position that the circumferential port therein registers with the port 9, a communication will be established between the interior of the drying cylinder and the outside, through the vent opening, the port 9 and the ports 12 and 13. When, however, the valve body is turned on itsaxis so as to carry the circumferential port out of register with the port 9 as shown in Fig. 2, the vent passage will be cut off from communication with the outside. H

The valve body is turned by means of an actuating member 14 in the form of a flat plate fixed to the outer projecting end of the valve body and provided with a plurality of radially extend'ing'arms 15, four inthe present instance, which are spaced equal distances from each otheri The actuating memberis adaptedto be operated so as to operate the valve while'the cylinder is rotating, its actuation being effected by interposingin the pathfof the actuating 21II1'lS 'tSU1tillJl6 abutment 16 such as a hammer handle, tool, a stickor like implement, held fixedly in the hands of the attendant. The cylinder in its rotation will carry the arm oi the actuating member into engagement with the abutment and by its continued movement will cause the actuate ing member to-be shifted around a partial rotation and will correspondingly shift the valve body, this action bringing the next arm in position to be actuated in a like manner in the next rotation of the cylinder. It is seentherefore that in this manner the valve body may be shifted around intermittently on its seatand the valve successively opened and closed to correspondingly open and close the vent passage.

In the operation of the valve to ascertain the presence or absence of accumulated water within the cylinder, and assuming that the valve is closed as shown in Fig. 2, the attendant interposes a suitable implement in the path of one of the upright arms of the actuating member, and the motion of'the cylinder will engage 'the'arm with the implement and cause thevalve to be turned to open position lf there is accumulated water within the cylind'erwater will be dis-- charged through the valve as the inner end of the vent opening passes through the body of water and as the continued motion of the cylinder will carry the vent opening above the level of the water, the discharge of the swater through the valve Will cease and steam will issue.- By permitting the cylinder to make a number of rotations with the valve in open position, and by noting the point in the rotation of the cylinder where the water ceases to flow and the steam begins to flow, the attendant will be enabled to calculate with suflicient exactness the level of the accumulated water Within the cylinder. When this has been determined the obstructingimplement is again placed in the path of the next arm of the actuating member, which by the first movement of the actuating member had been brought to position, and this arm being engaged with the implement the valve is given a further turn, and the ports being moved out of register, the valve will be closed and the communication through the vent opening cut off. If in the above described testing operations no water issues from the valve but only steam, the attendant will know of course that the cylinder contains no accumulated water. 'In Fig. 5 I have illustrated a modification of my invention. Here it will be seen that the actuating member ll is rotatably mounted on a stud 17 projecting outwardly from the cylinder head alongside the valve, which latter is movable axially of the cylinder to open and closed positions and is operated by circumferential cams 14 on the inner face, of the actuatingmember. The valve seat 7" in this case is formed on an annular rib projecting inwardly from the inner side of the bushing 6, which bushing contains an open ing 6' therethrough from end to end, the inner end of the opening being in communication with the vent opening t and the outer end of the opening being in communication with the atmosphere." The valve body 11 is of disk-like or circular form to cooperate with the valve seat, and is provided on its outer side with an outwardly extending axial actuating stem 11 sliding through and guided in a guide opening in a spider 18 seated in the outer end of the bushing. At its inner side the valve body is provided with an inwardly extending axial stem 11 sliding through and guided in an opening in a spider 19 at the inner end of the bushing, a

. spiral spring 20 encircling the stem 11 and bearing respectively against the spider and valve body and acting to urge the valve body with spring pressure toward the seat to closed position. The outer stem 11 projects beyond the end of the bushing in the path of the cams 14: before alluded to, so that in the rotation of the actuating member 1 1 the stem will be pushed inwardly by the cams against the force of the spring and will move; the valve body away gfrom its seat and openthe valve. There are two earns 14? on the actuating member extending circumferentially thereof, each cam extending, half way arounch-and each being formed with a high or elevated end 14 which inclines gradually as at 1st, and merges into a flat lower p'ortionll which terminates where the "elevalve against the counter-pressure of the spring. The parts are of such formand relative arrangement that the high part of the cam will be engaged with the valve'stem at the moment that theactuating member.

disengages from the abutmentor implement and comes to rest, the result being that the valve will be retained in open position. The valve is allowed to remain in this position until the attendantby observing the nature of the jet issuing through the valve, "determines the conditions obtaining within the cylinder as heretofore described in connection with the first form of the apparatus. When this has been determined the valve may be closed by again interposing the implement in the path of the next arm of the actuating member, which member will be caused to advance a farther distance and will thereby carry the high part of the cam out of engagement with the valve stem and present the low part of the next cam opposite the stem, the valve-being quickly closed by the spring as the high part of the cam is disengaged therefrom.

It is seen therefore that the valve may be alternately opened and closed by the successive movements of the actuating member while the cylinder is rotating at high speed, it being unnecessary to slow down the cylinder or interrupt the operation of the machine in operating the valve to make the test. The actuating member, it will be observed, extends in a plane parallel with the plane of the end of the cylinder and rotates about an axis parallel with the axis of rotation. This arrangement I deem of importance and advantage in that it disposes the actuating member in such position relative to the end of the cylinder and the direction of rotation, that the operating abutment or implement may be interposed with precision and certainty in the path of the arms of the actuating member, notwithstanding the fact that the cylinder may be rotated at high speeds. The valve may therefore be accurately and effectively controlled in its opening and closing movements, and the tests performed with celerity and uniformity.

the ends to be attained. It ismanifest, how ever, that the details ofthe mechanisms may be variously changed and modified without departing from the spirit of my invention provided the operation will be substantially as indicated above; and it will be understood that the invention is not limited to any particular form or construction, of the parts except in so far; as such limitations are specified in the claims. p I

. Havi g thus described my invention, what I claim is I. I

1. In'combination with a rotary cylinder having means for the introduction of steam thereinto and provided with a vent opening, a valve applied to said opening, anda rotary valve actuating member sustained by the cylinder and provided with. a plurality ofactuating arms adapted in the successive rotations of the cylinder to be engaged successively with an abutment to actuate the valve, said arms being disposed at such intervals that the movement of one arm by engagement with the abutment in one rotation of the cylinder will bring another arm in position for actuation.

2. In conbination with a rotary cylinder having means for the introduction of steam thereinto and provided with a vent opening, a valve applied to said opening, and a Valve actuating member sustained by the cylinder and rotatable relatively thereto about an axis parallel or substantially so with the axis of rotation of the cylinder, said actuating member being adapted by the rotation of the cylinder to be engaged with an abutment and moved relatively to actuate the valve.

3. In combination with a rotary cylinder having means for the introduction of steam thereinto and provided with a vent opening, a valve applied to said opening, and a valve actuating member comprising a rotary star wheel sustained by the cylinder and adapted by the rotation of the cylinder to be engaged with an abutment and moved relatively to actuate the valve.

4. In combination with a rotary cylinder having means for the introduction of steam thereinto and provided with a vent opening, a valve applied to said opening, and a rotary valve actuating member sustained by the cylinder and provided with four radially extending arms spaced equal distances apart, said arms adapted in the successive rotations of the cylinder to be successively engaged with a relatively fixed abutment to actuate the valve.

5. In combination with a rotary cylinder having means for the introduction of steam thereinto and provided with a vent opening, a valve seat having a port communicating with the vent opening, a valve body rotatable on said seat and provided with a port adapted in the rotation of the valve to be moved into and out of register with the port in the valve seat, said valve being rotatable about an axis parallel or substantially so with the axis of rotation of the cylinder, and an actuating member fixed to the valve and adapted by the rotation of the cylinder to be engaged with an abutment and moved relatively to actuate the valve.

6. In combination with a cylinder having means for the introduction of steam thereinto and provided in one end with avent opening, a valve applied to said opening, and a valve actuating member extending at the outer side of the end of the cylinder and parallel therewith and rotatable about an aXis parallel or substantially so with the axis of rotation of the cylinder, said member adapted by the rotation of the cylinder to be engaged with an abutment and moved relatively to actuate the valve.

7 In combination with a rotary cylinder having means for the introduction of steam thereinto and provided with a vent opening, a valve applied to said opening, and a valve actuating member sustained by the cylinder and adapted to be moved relatively thereto to'actuate the valve without slowing down the speed of the cylinder.

8. In combination with a rotary cylinder having means for the introduction of steam thereinto and'provided with a vent opening, a valve applied to said opening, and a valve actuating member sustained by the cylinder and rotatable relatively thereto, said actuating member being adapted by the rotation of the cylinder to be engaged with an abutment and moved relatively to actuate the valve.

In testimony whereof, I have aifixed my signature.

AMBROSE H. WHITE.

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Washington, D. G. I 

